It’s a Pendulum related card that helps get your Pendulums where you need them.
MACR-ENSP1 Pendulum Switch
Continuous Trap Card
You can target 1 card in your Pendulum Zone; Special Summon it. You can target 1 Pendulum Monster in your Monster Zone; place it in your Pendulum Zone. You can only use 1 “Pendulum Switch” effect per turn, and only once that turn.